改善基于的不可燃电解质,实现安全稳定的金属电池
Sha Fu1, Xuanzhi Xie2, Xiaoyi Huangyang1
1School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China.
Molecules (Basel, Switzerland)
|May 27, 2023
概括
研究人员开发了一种用于高能金属电池的新型不易燃电解质. 这种新的电解质增强了阳极的稳定性,并提高了电池循环性能和安全性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 高能量密度的金属电池对于先进的能量存储至关重要.
- 为了实现这些电池的高安全性和稳定性,需要新的不可燃电解质.
- 电解质设计对于稳定的金属阳极循环和接口兼容性至关重要.
研究的目的:
- 设计和评估用于金属电池的新型不可燃电解质.
- 为了提高金属沉积和电极-电解质接口的稳定性.
- 为了提高高能金属电池的安全性和循环性能.
主要方法:
- 将功能添加剂二甲基基酸盐和乙烯碳酸盐引入三甲基酸盐电解质中.
- 制造和测试使用设计的基电解质对称的基电池.
- 使用新型电解质对LiNi0.8Co0.1Mn0.1O2和LiLiLiNi0.6Co0.2Mn0.2O2全细胞进行评估.
主要成果:
- 与传统的碳酸盐电解质相比,设计的电解质具有高热稳定性和阻燃性.
- 二二对称电池在0.2 mA cm-2下表现出超过700小时的循环稳定性.
- 观察到光滑而密集的金属阳极形态,表明了更好的接口兼容性.
- 完整细胞表现出增强的循环稳定性: 200 个循环的李玉LiNi0.8Co0.1Mn0.1O2和 450 个循环的李玉LiNi0.6Co0.2Mn0.2O2在0.2 C.
结论:
- 开发的基于的不可燃电解质有效稳定了金属阳极.
- 新型电解质显著提高了金属电池的循环稳定性和安全性.
- 这项工作为储能系统中先进的不可燃电解质提供了有前途的方法.
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